The UJK MultiFunction workbench top is 18mm thick Valchromat. Valchromat is not MDF it is a type of HDF, which is harder and denser than standard MDF and more resistant to impact damage. Valchromat has greater internal cohesion, higher mechanical strength and is more moisture resistant than MDF. The UJK workbench top has a grid of 20mm Twist Dog holes; 11 holes by 7 holes. These holes are CNC machined to guarantee accuracy, aligned lengthways and widthways with the rows perfectly square to each other. Twist Dogs lock securely in the holes and won’t rock or budge until released. These 20 diameter holes also allow the use of bench dogs and many other accessory clamps, guide rails and stops to hold, saw, rout and machine your work with spot-on accuracy. Made from 18mm thick Valchromat, the 1,102mm x 718mm Isometric Top is a snug drop-in fit in the UJK MultiFunction workbench frame or the Festool MFT base. Making it a suitable replacement for the standard Festool top. This workbench top is certified by the Pan European Forest Council (PEFC).